title: Experimental verification of the modified Gran methods applicable to redox systems.
abstract: This study describes the application of the modified Gran I and II methods for determination of equivalence volume in redox titrations and for calibration, i.e. for determination of the correct slope of the redox indicator electrodes, which appears to be a major problem in using these electrodes. The four new versions of the Gran II method, denoted as MG(II)B, MG(II)C, MG(II)D and MG(II)E methods, in which the problem of calibration and determination of equivalence volume are considered simultaneously are suggested and compared with MG(I)S and MG(II)A methods known hitherto. All the methods are experimentally tested and discussed.
authors.affiliation: Department of Inorganic Chemistry and Technology, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
authors.forename: Maja
authors.initials: M
authors.lastname: Ponikvar
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Michałowski
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Kupiec
authors.forename: Sławomir
authors.initials: S
authors.lastname: Wybraniec
authors.forename: Maciej
authors.initials: M
authors.lastname: Rymanowski